某金沙江大桥顺层岩质岸坡稳定性分析  

Stability Analysis of Bedding Rock Bank Slope along a Large Bridge on Jinsha River

作　　者：朱冬林[1] 张俊瑞[1] 安静仪 ZHU Donglin;ZHANG Junrui;AN Jingyi(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China;Wuhan University of Technology,Wuhan 433070,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056 [2]武汉理工大学,武汉433070

出　　处：《路基工程》2019年第5期111-115,共5页Subgrade Engineering

摘　　要：顺层岩质边坡的稳定性常常影响到山区高速公路建设的顺利开展。通过对金沙江某拟建大桥的工程地质和岩体结构分析,采用基于地质强度指标(GSI)的等效Mohr-Coulomb强度参数法确定了桥基岩体力学参数,并用极限平衡法分析了四川侧岸坡拉裂-滑移破坏模式的稳定性。计算结果表明:四川侧岸坡在天然工况和暴雨工况下是稳定的,但在暴雨+地震工况下处于欠稳定状态,需要采取支挡措施。The stability of bedding rock slope always impacts the construction of mountainous highway.Herein the engineering geology and rock structure of a bridge intended to be built on Jinsha River were analyzed,thus the mechanical parameters of the bridge foundation rock were determined by the equivalent Mohr-Coulomb strength parameter method based on geological strength index(GSI);then the stability of cracking-sliding failure mode of the bank slope in Sichuan was analyzed by limit equilibrium method.The result shows that the bank slope in Sichuan is stable in natural and rainstorm conditions,but is understable in rainstorm plus earthquake conditions and needs retaining measures at that time.

关 键 词：顺层边坡 破坏模式 稳定性 拉裂-滑移 岩体强度参数 

分 类 号：TU457[建筑科学—岩土工程]